There are many reasons why drinking hot water causes sweating. 1, first of all, hot water sweating is due to the water temperature is too hot, into the human body is easy to cause the body heat rise, thus causing capillary expansion, sweat glands secrete sweat for heat dissipation, so often appear to drink hot water sweating phenomenon, this is a normal physiological phenomenon, usually the human body temperature can be improved. 2, second, drinking hot water sweating may also be due to certain adverse The actual fact is that you will be able to get a good deal on your own, and you’ll be able to get a good deal on your own. These patients usually need to take vitamin B to improve their sweating.